The estimated value of Z or Z-statistic (Z 0) is compared to critical value of Z from standard normal-distribution table to check if the null hypothesis in the Z-test is accepted or rejected at a specified level of significance (α). Standard normal-distribution table & how to use instructions to find the critical value of Z at a stated level of significance (α) for the test of hypothesis in statistics & probability surveys or experiments to large samples of normally distributed data. Find Critical Value of t for One or Two Tailed Z-Test
